OK, that reinforces my suspicions. That profile is not good. Defective manufacturer profiles is a big problem, mostly on the Windows side because these profiles are often distriuted through Windows Update. But hook an external display to a Mac, and you often get the same problem.
I googled that display to see what type it is. Viewsonic don't say - but as far as I know 23 inch 1920 x 1080 panels were only ever produced as standard gamut. No wide gamut 23 inch panels were made by anyone. So we can assume this is a standard gamut display ("sRGB").
Here we need to keep in mind the basic job of the monitor profile. It needs to be an accurate description of the display's actual and current behavior. The profile is a map, and like any map it needs to correspond to the actual terrain. A color managed application uses this map to convert the numbers sent to screen, thus representing the file correctly.
That's why you use a calibrator to get an accurate profile. It measures the display after the calibration is finished, and builds a profile based on that measurement. The profile has much higher precision than the calibration alone.
If you don't have a calibrator, you use the profile that most closely matches the display's color space. In this case, we can assume that's sRGB IEC61966-2.1. So try to set that as system default.
It should be clear that a calibrator is the proper way to deal with this (and I'm fairly confident that would fix this). But a reasonably close profile is better than a broken one.
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